1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec998dda6f19768700b6fd56bde091ec03a806655dc8365877f9f1122c64e9. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d67334f7-c9a9-4d1a-8c2e-e60553e954fc.json and https://artists.proofprofile.net/proofs/artist/d67334f7-c9a9-4d1a-8c2e-e60553e954fc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Haydn: L'anima del filosofo, Hob. XXVIII:13 (Live)
Frederick Septimus Kelly: A Race Against Time
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05743fe316abe2e0c0adfc2584d60dbee6da528c07c0ad62df93a857e5adceb. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB01650556 — a six-check JSON result.
Frederick Septimus Kelly – Orchestral Works
Sacrifice (Les musiciens et la Grande Guerre, Vol. 25)
When Yesterday We Met: Songs by Tchaikovsky and Rachmaninoff
15 Romances, Op. 26: XIII. When Yesterday We Met
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6104761f454e8a0c1178523e7d4345d3cb3b4c9afe43b3ce8709d0e4a6ee9ba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB02250058 — a six-check JSON result.
6 Romances, Op. 6 TH 93: II. Not a Word, My Friend
Ich wollt’ meine Lieb’ ergösse sich, Op. 63 No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24295eb2ca7c56bdc6f1e91d5911930d724a426cb34457c5621bcf9186dbf7f7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB02050398 — a six-check JSON result.
Foster: The Pearl of Dubai Suite, The Ballad of Reading Gaol